oe detroit



A. L. LUMBY.

SAFETY DEVICE.

APPLICAHON FILED NOV.24. 1916.

2 SHEETS-SH I.

anventd attain:

A. L. LUMBY.

SAFETY DEVICE.

APPLICAHON FILED Nov. 24,1916.

Patented Dec. 16,1919:

2 SHEETS-SHEET 2.

AVERY L. LUMBY, or DETROIT, MICHIGAN, AssIcNoaTo oAmiLLAo Moron can ICOMPANY, OF DETROIT, MICHIGAN, A CQRPORATION'OF MICHIGAN.

SAFETY DEVICE.

Specification of Letti-irs Patent. Patented Dec, 16, 1919.

3 Application filed November 24, 1916. Serial No. 133,281. 7

To all whom it may concern:

Be it known that I, AVERY L. LUMBY, a citizen of the United States, andresident of Detroit, Wayne county, State of Michigan, have inventedcertain new and useful Improvements in Safety Devices, of which thefollowing is a specification.

This invention relates to safety devices and more particularly to sandblasting ap paratus. Q

Considerable attention has been directed to the operation of devices forsand blast; ing metallic articles, with the result. that the menace tothe health of sand blast operators has been generally recognized. Nu-*merous expedlents and devices for the'pro- 1760131011 of the operator,such as respirators,

various types of hoods and head dresses have been tried, but all haveproved either impracticable or Some of these devices may offer partialprotection, but observations of the usual practice of sand blastoperators disclose that previous devices are either so uncomfortable'orso unsatisfactory that the operators frequently pass unprotected throughthe blastmg rooms, subjecting their lungs to the sand.

and dust laden air.

Therefore, one of the objects of this invention is to overcome thedisadvantages accom-.

process is carried on, or he may protect himself by a suitable properlyventilated head dress or cloak. With my arrangement the operator maythen observe the work through i a piece of gauze, the vision of which iskept clear of'dust and sand by a circulatlon of air through the gauze.The various objects and arrangements will clearly appear from thefollowing description taken in connection with the accompanyingdrawings, which form a part of this specification, and: in which:

Figure 1 is a front elevation, with por tions broken away, of-a sandblasting chamber provided witha preferred form of my invention totallyunsatisfactory.

provided with a suitable cone shaped sheet] metal bottom 14, and asimilarly constructed top 15. The end walls and rear side wall may be ofany well known sheet metal panel construction. One endofthe chamber maybe provided with a swinging door 16, suit ably hung on a'stud 17 as byhinges 18, and

maintained closed by a lock19. The articles 1 which are to be sandblasted maybe'introduced'into the chamber through an end door andsupported on a grating bar 20, arrangedhorizontally across the lowerportion of the chamber.

It will be noted'that the top 15, of the chamber is provided with a.flue 21, which may befconnected with any well known means for producinga suction draft within the chamber for keeping the chamber free fromdust and grit laden air.

The front wall of the chamber consists of.

metallic bars or straps '22, suitably secured 1 adjacent their upper andlower ends as by rivets22, toa header 13, and sill 12, respectively.Sheet metal panels 23, may be suit: ably secured as by IlVQtS 24,between opposite studs 11', bars 22, sills 12, and headers 13, leavingan opening 25, between the inner ends ofthe panels 23. A sliding door isarranged across the opening 25, comprising a cross member 26, and spacedsliding panels 27. Suitable hangers 28, and pulleys 29, which arearranged at the opposite ends of the cross member 26, are adapted tosupport the'sliding door on rails 30, which are secured as by bolts tothe front header 13. A curtain or flexible'cover 31, preferably ofcanvas, may be provided with a loop 32, and hungfrom the cross member26.

.The curtain31 has arranged therein, a cloak portion or apron 33, havingarm sleeves 34, and. ahead dress or hood 35.v The front portion of thehood is provided with an aperture 86, across which may be suitablyarranged a piece of gauze 37 which forms a screen. A metal dome plate38, and head piece 89, may be suitably secured as by rivets 40, to thehood 35. A head shield etl, having a neck protector a2, is adapted to besecured as by rivets d3, to the rear portion of the head piece 39. 1

It will be noted that the head and neck protector extends partiallyacross the rear opening l i. of the hood 35. A weight do, pulley a6, anda rope ll, which is secured to the hood 35, are adapted to take up an 1slack in the curtain 31, with various movements of the operator. A bar,or weight 48, may be inserted in the bottom loop 4.9, of the apron ofthe cloalr for preventing the flapping of its lower portion. A sandblast nozzle 50, is suitably connected to an air hose 51, and a sandhose 52. It will be noted that the hose 52 is fed from a poclret formedin the bottom 14 of the chamber.

It will be noted from the foregoing description that the operator mayslip his head under the piece 39, forwardly of the protectors ll and d2,so that he may have an unobstructed view of the interior of the chamberthrough the gauze 37. With a. partial vacuum, existing within thechamber by the action of the line 21, there will be a com stantcirculation of air entering through the; rear opening 14 0;? the hoodand passing outwardly through the gauze 87, the operator thereby beingcontinually supplied with fresh air, and the gauze being maintainedconstantly free from dust and grit by the same circulation. The membersll and 42, protect the back of the operators head and neck from theincoming draft of air.

Vfith my apparatus the operator. is practically outside of the sandblasting chamber, except for his hands, and he is at the same time in aposition to observe the results of his work without subjecting himselfto the flying particles or" dust and sand. It will also be noted thatthere will be a constant circulation of air through the cloak 33 and thesleeves 34, thus providing comfortable conditions for the operator-whilewearing the same.

While I have described and will specifically claim what I deem to be apreferred embodiment of my invention, it will be obvious to thoseskilledin the art that various changes and modifications may be madewithout departing from the spirit and scope hereof.

Having thus described my invention, what claim and desire to secure byLetters atent is:

1. In device of the class described, a flexible curtain having anoperators head lress provided with afrout opening and (l a rear opening,the rear opening adapted to be norm ally unrestricted, and. the frontopening being provided with a piece of gauze, and a shield for the backand the side of the operators head and which shield is arrangedforwardly of said rear opening.

In a device of the class described and in combination with an inclosedchamber provided with an opening in one of its sides, of a flexiblecurtain for closing said opening, and which curtain is provided with anaperture; a piece of gauze covering said aperture; and means forcirculating air from the exterior of said chamber to the interiorthereof through said gauze, as and for the purpose set forth.

3. In a device of the class described, the combination with an inclosedchamber provided with an aperture in one of its sides, a flexiblematerial for covering. said aperture, said flexible material beingprovided with an observation aperture, of a piece of gauze for. coveringsaid latter aperture, means for circulating air from the exterior ofsaid chamber to the interior thereof through said latter aperture, andsleeves carried by said flexible material and through which the arms ofan operator may be thrust into the said chamber.

4. In a device of the class described, the combination with an inclosedchamber provided with a lateral opening, a lateral panel of flexiblematerial extending across said opening and provided with an observationaperture and having a piece of gauze over said aperture, means fordischargmg air from said chamber whereby air is drawn from the exteriorof said chamber through said aperture, and an opening in said flexiblematerial through which the hand of the operator may be thrust into thechamber.

5. In a device of the class described and incombination with an inclosedwork chamber provided with a lateral opening in which an operator may belocated; a flexible curtain extending across said opening and having acloak and head dress for protecting the operator, said head dress beingprovided with front. and rear openings; a gauze for covering said frontopening and means for withdrawing air from the interior of said chamber.

6. In a device of the class described, the combination with an inclosedwork chamber provided with a lateral opening in which an operator may belocated, a flexible curtain extending across said opening, and whichcurtain is provided with a cloak and head dress for protecting theoperator; said head dress having front and rear openings and said frontopening having a. gauze covering extending across the same; and a shieldextending upwardly from the cloak to the top of said head dress forprotecting the back of the head and of the neck of the operator.

7. In a device of the class described, the combination with an inclosedwork chamber provided With a lateral opening in which an operator may belocated, of a flexible member extending across said opening and havingcloak and head dress members for protecting the operator and said headdress being provided With front and rear openings; a gauze for coveringsaid front opening; and means for causing a flow of air to occur fromoutside said chamber into said head-dress through said rearopening, andout from said head dress through said front opening and into theinterior of said chamber.

8. In a device of the-c1ass'described, the

combination with an inclosed Work chamber provided With a lateralopening; a flexible curtain extending across said opening, said curtainhaving an observation aperture over which is arranged a piece of gauze,and having also additional apertures through Which the operators armsmay extend into the interior of said chamber, the entire arrange- V mentbeing such that the operator may observe the interior of said chamberhile exteriorly thereof; and means for maintaining a circulation of airinto said chamber through said gauze.

In testimony whereof I aflix my signature.

AVERY L. LU'MBY.

